Automationdirect.com DL05, Руководство пользователя

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High-Speed Input and
Pulse Output Features
3–11
High-Speed Input and Pulse Output Features
Input Configuration
Register
Function Hex Code
Required
X0 V7634 Counter Clock 0001
X1 V7635 Filtered Input xx06, xx = filter time
0 - 99 ms (BCD)
X2 V7636 Counter Reset (no interrupt) 0007* (default)
0207*
Counter Reset (with interrupt) 0107*
0307*
FIltered Input xx06, xx = filter time
0 - 99 ms (BCD)
*With the counter reset, you have the option of a normal reset or a faster reset.
However, the fast reset does not recognize changed preset values during program
execution. When ‘0007’ or ‘0107’ are set in V7636 and preset values are changed
during program execution, the DL05 recognizes the changed preset values at the
time of the reset. When ‘0207’ or ‘0307’ are set in V7636 the CPU does not check for
changed preset values, so the DL05 has a faster reset time.
You may recall that the counter instruction is a standard instruction in the DL05
instruction set. Refer to the figure below. The mnemonic for the counter is
UDC
(up-down counter).The DL05 can have up to 128 counters, labeled CT0 through
CT177. The high speed counter in the HSIO circuit is accessed in ladder logic by
using UDC CT76. It uses counter registers CT76 and CT77 exclusively when the
HSIO mode 10 is active (otherwise, CT76 and CT77 are available for standard
counter use). The HSIO counter needs two registers because it is a double-word
counter. It has three inputs as shown. The first input (Enable) allows counting when
active. The middle input is a dummy and has no fuction other than it is required by the
built-in compiler. The bottom signal is the reset. The Dummy Input must be off while
the counter is counting.
Reset Input
UDC CT76
Kxxxxxxxx
Enable Input
Dummy Input
Reset Input
UDC CTxx
Kxxxxxxxx
UP Count
DOWN Count
Standard Counter Function HSIO Counter Function
D
Counts UP and DOWN
D
Counts UP only
D
Reset input is internal only
D
Reset may be internal or external
D
Preload counter by write to value
D
Can use Dummy Input to change count
Writing Your
Control Program